Remark 5.2 Further examples of fast-slow maps for which the theory developed herein applies include the so-called Izhikevich model [1]} obtained by Euler discretization of a continuous-time model in [2]}, different variants of the Rulkov model [3]}, [4]}, [5]}, and the Courbage-Nekorkin-Vdovin model appearing in [6]} and later modified in [7]}. We refer to the review article [8]} and the many references therein.

